Cooling means for internal-combustion engines



Oct.- 28,' 1930. H. A. FLOGAUS COOLING MEANS FOR INTERNAL COMBUSTION ENGINES Filed Dec. 8, 1927 Sheets-Sheet 1 Oct. 28, 1930.

H. A. FLOGAUS COOLING MEANS FOR INTERNAL COMBUSTION ENGINES Filed Dec 8, 1927 2 Sheets-Sheet 2 Patented Oct. 28, i930 UNITED STATES PATENT OFFICE HOWARD A. FLOGAUS, F DETROIT, MICHIGAN, ASSIGNOR TO RALPH L. .SKINNER, OF

DETROIT, MICHIGAN COOLING MEANS FOBINTERNALCOMBUSTION ENGINES Application filed- December 8, 1927. Serial No. 238,501.

This invention relates to eflicient and effective novel and improved structural and functional means for cooling the cylinders and their heads of internal-combustion engines by means of air, rather than by the usual water-jackets.

The main or leading object or purpose of the invention is the provision of a simple and inexpensive structure which will peri form the cooling action more advantageously than has heretofore been possible, one aim of theinvention, in one of its aspects, being the initial cooling of the cylinder-head, and then the cooling by such air after it has left i v the head.

reference numerals have been used to denote the same parts of the structure.

In these drawings, Fig. 1' is a central, vertical section through one of the cylinders of an internal-combustion motor;

Fig. 2 is a horizontal section on line 22 of Fig. 1;

Fig. 3 is a similar section on line 33 of Fig. 1;

Fig. 4 is a plan section on line 44 of Fig. 1, on the plane of the inlet and exhaust ports; and

Fig. 5 is a fragmentary, vertical section on line 55 of Fig. 1.

Referring to these drawings, it will be noted that the outer cylinder 11 has the usual intake and exhaust ports 12 and 13, respectively, such external cylinder having within it a second inner cylinder 14 ported at 15 and 16 in register with the ports 12 and 13, arcuate, ported, reciprocatory admission and discharge valves 17 and 18, slid up and down by means not shown, being accommodated in suitable recesses or grooves in the mating surface of the one or the other cylinder.

Obviously, so far as the cooling means of this invention is concerned, the exact style of engine, whether of the sliding valve or poppet-valve type, is of little moment.

In the top of the cylinder, a depressed head 19 is secured by screws 20, 20, such head having a circular, spark-plug chamber 21, which; extends down through a tortuous passage 22 having a vertical mouth 23 for the entrance of the cooling air forced thereto by a fan or pump, not illustrated, and a horizontal airdischarge opening 24, the head and its associated parts being preferably, but not necessarily, cast'in one piece.

As is clearly portrayed in Fig. 1, the top wall of the conduit 22 practically centrally of the head, and on opposite sides of the wall of the socket 21, is depressed or deflected downwardly at 25, to compel the air entering the head chamber or jacket to flow directly 70 downwardly and-impinge on the, top surface of the heated, bottom wall of the head, the air then flowing up the channel beyond the barrier 25, ready for delivery through the end opening 24.

The outer surface of the cylinder is equipped with a number of horizontal, vertically-separated, outstanding, circular fins or flanges 26, 27, 28, 29, 30, 31, 32,33, desirably integral with the cylinder-casting, of which the uppermost one 26 forms an inward extension or part of a curved wall 34 reaching to the top ofthe cylinder and providingan annular compartment 35 having an. admis-v sion-port 36 in register and communication with the opening 24.

Diametrically opposite the inlet 36,,the top flange 26 is omitted to form a port 37,'whereas, beneath the admission-opening "36. the second flange 27 is cut away to provide an aperture 38, and, similarly, below port'37 an opening 39 is supplied in the next flange or fin 28.

As is presented in Fig. '4, the next fin 29, on a level with the centers of the cylinder intake and exhaust ports, is of a duplex character, being'composedof two parts on opposite sides of the cylinder, and each extending around the latter only from one port wall to the next, each such section of the 100 fin'having a port 40 therethrough approximately midway between the motor ports 12 and 13.

The next lower flange 30 has two oppositely-disposed* openings 41, -41 therethrough ninety degrees from the ports 40, and located directly below the engine-ports 12 and 13, and, in a similar manner, the fin 31 below it-has a like pair of opposite apertures 42, 42 below the ports 40, 40.

Fin 32 has a pair of ports 43, 43 one hundred and eighty degrees apart, below the openings 41, 41, and the lowermost flange 33 has two ports 44, 44 below and in register with the apertures 42, 42.

A sheet-metal shell or casing 45 encircles all of these fins, except the upper one designated 26, which has a depending circular mm ates practically as or rib 46 inside of which the top margin of the jacket member 45 fits, the lower end of the latter, below the bottom fin .33, being bent or deflected inwardly at 47 (Fig. 5) into contact with the outer face of the cylinder, such inturned flange, however, being cut away or omitted at two opposite points to provide ports 48, 48 below the ports 43, 43.

As is indicated in Fig. 1, the sheet-metal enclosure is apertured in register with the engine intake and exhaust ports to receive the walls forming the latter.

The new and improved construction operfollows The cooling air forced into the jacket of the head through the entrance port 23 is caused, by .the shape of the jacket-wall, to flow down directly on to and strike the top face of the bottom wall of the head, whereby the head is efiectively cooled, thus aiding such head, which on its under surface is provided with abrupt shoulders, to prevent detonation of the explosive mixture in the cylinder.

The direct, positive, and forceful contact of the air with such wall assures adequate cooling of the latter, the air then flowin through the ascending portion of the hea acket and passing into and throu h the annular or ring com artment 35 on 0th sides of the cylinder, deliverin therefrom through the port 37 into the next ower, annular compartment between adjacent fins or flanges, where it divides and flows around both sides of the cylinder, ultimately finding exit through the a rture 38 into the succeeding clrcular cham 1', wherein it flows around both sides of the cylinder and discharges through the gap 39 into the next annular chamber, from which it delivers through the two ports 40, 40.

In view of the fact that all of those flanges below the flange 29 have two apertures or ports at an an lar osition of ninety degrees removed om t e orts of the flanges immediately above and low it, it will be clear that, as the air proceeds in itstravel down the cylinder from flange 29, any portion of it is compelled to flow only onequarter ofthe way around the cylinder, this arrangement being employed because such part of the cylinder is hotter than that equipped with the single-port fins.

I claim:

1. An internal-combustion engine-cylinder having a plurality of transverse outstanding fins spaced apart and a casing enclosing such fins, the. successive fins being ported out of register to compel the cooling air passing through the jacket formed'by the casing to follow a tortuous path.

2. The combination of an internal-combustion engine-cylinder having separated,- outstanding, ported, cooling fins and a casing enclosing such fins forming a tortuous passage along the cylinder, and an airjacketed head for said cylinder with the jacket in communication with said passage, whereby cooling air flowing through the jacket will thereafter flow through said cylinder passage.

3. The combination of an internal-combustion engine-cylinder and a depressed head for said cylinder having a tortuous air-jacket which causes the air entering the jacket to impinge directly on the surface of the depressed wall of said head closing the cylinder.

4. The combination of an internal-combustion engine-cylinder and a head for the cylinder having an inner shouldered surface to reduce detonation and having a tortuous airjacket which directs the entering air to impinge directly against the surface of the head opposite said shouldered surface.

In witness whereof I have hereunto set my hand.

H. A. FLOGAUS. 

